Magnetic Coil Companies and Services

IQS Directory provides a comprehensive list of coil winding companies. Use our website to review and source top coil winding companies with roll over ads and detailed product descriptions. Find companies that can engineer coil winding to your companies specifications. Then contact the coil winding companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product news articles.

  • Sag Harbor, NY

    We are proud of the craftsmanship of our engineers. All of our products are made right here in the United States and we promise that these items are created from high quality resources. Our electrical coils are unique and efficient. We are dedicated to manufacturing the best coils around. Our teams utilize sophisticated to procedures to develop these top notch electrical coils. Give us a call today to learn more information!

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  • Bristol, CT

    Established in 1973, Classic Coil Company is a Contract Manufacturer of electronic coils. We manufacture coils for a variety of industries; winding wire gauges from 4-58 AWG. We are ISO 9001-2015 certified, ITAR registered and DFARS Compliant. Our Engineering services allow us to assist with design, reduce cost, and increase efficiency in production. Call or visit our website to learn more about our capabilities.

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  • Alpha, NJ

    Since 1962, Torelco LLC has been a supplier of electric coils and transformers of superior quality. We offer custom coils, solenoid coils, ferrite core coils & toroid wound coils to serve a range of industries. Markets served include medical, military, electronics, and industrial. When you work with us, our promise is to build to the exact specifications and meet the custom needs of our customers.

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  • North Fort Myers, FL

    Check out what’s new online at Precision Econowind, manufacturer of the highest quality custom coils at reasonable prices, with on time delivery. Serving the coil industry for over 30 years, we’re experienced with producing loudspeaker & medical industry coils, coils wound on customers’ bobbins/tooling; freestanding, flat wire, edge wound, square, rectangle & shaped coils. Submit your specs today!

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  • Winsted, CT

    At Dufrane Technologies, we take pride in our extensive range of electric coils. Our comprehensive product portfolio encompasses a wide variety of coil types, including solenoid coils, electromagnet coils, induction coils, and more. Whether you require custom-made coils or standard options, we have the expertise and resources to fulfill your specifications with precision.

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Coil Winding Industry Information

Coil Winding

Coil winding is a process used to produce an electromagnetic field by winding an electric conductor wire in the shape of a coil, spiral, or helix. The structure of the magnetic field, which includes its inductance, resistance, and strength, depends on the design and shape of the coil winding. The electromagnetic field of a coil winding is created by passing an electric current through the wire of the coil. A varying magnetic field passes through the interior of the coil to generate a current in the conductor. How the coil is wound determines its efficiency and conductivity. The differing winding processes are designed to serve a certain purpose for the creation of the electromagnetic field.

Quick links to Coil Winding Information

Notable Types of Coil Winding

The forms of coil winding are jumble, orthocyclic, toroidal, pancake, and helical. In the winding process, wires should be tightly and densely packed to reduce air flow, or space, in order to increase the efficiency and reliability of the coil as well as the coils heat conductivity.

Jumble Winding
Has poor fill factors. Wires are placed randomly, causing a wider distribution of wire lengths and ranges of electric coil resistances. Though this is a disadvantage in coil winding, it is used in mass production because it can be done quickly without the need of operator oversight. Jumble windings are used as relay coils, for small transformers, ignition coils, and small electric motors using small wire gauges of 0.05 mm or less.
Orthocyclic Winding
Has an optimal fill factor for round wires. The upper layers of wires are placed in the grooves of the lower layers. The greatest volume is achieved by winding the wires parallel to the coil flange. Winding goes around the coil body to meet the previous wire and make a step with the size of the wire gauge, which is called a winding step. The area of the step depends on the gauge of the wire and the coil bobbin geometry.
Toroid Winding
Used with low frequency electricity. A toroid is used as an inductor to boost the frequency. As the toroid turns, it increases the frequency. Toroids are produced by winding copper wire through a circular ring, which is evenly distributed over the circumference of the ring. The benefits of toroid windings are low core loss with power density.
Pancake Winding
Several types of windings are referred to as pancake because of the conductors being arranged as discs. The term actually refers to a type of coil that is in shell form transformers. In pancake windings, conductor wires are wound in a rectangular pattern with their wide face horizontal or vertical. It is a winding that is used for interleave arrangements.
Helical Winding
Cylindrical and leaves a gap between adjacent turns. The winding consists of flat parallel rectangular conductors that are close to each other in the radial direction of the winding. Uniform distribution of current between the parallel branches is created by transpositioning of the conductors.